Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering one-stop explosion-proof technology consulting services.
What standards are used for explosion-proof certification? What are the technical requirements?
Explosion-proof is a type of explosion-proofing for electrical equipment.
Its housing can withstand explosive mixtures entering the housing through the housing joint surfaces or structural gaps, and undergo internal explosions without being damaged.
And ignite an explosive gas atmosphere formed by one or more gases or vapors.
Explosion-proof casings must possess both explosion-proof and anti-explosion capabilities. Generally, the casings for explosion-proof products tend to be heavy and are suitable for products and equipment that are fixedly installed and used.
Combustion-proof interface width, gap, and roughness are the three essential elements of explosion-proof housing design.
Design requirements for explosion-proof three elements vary depending on different explosive gas environments used in Class I mining, non-mining Class IIA, IIB, and IIC.
Refer to the design standards of GB/T3836.1 and GB/T3836.2 for specifics.
Zhonuo Testing has long focused on explosion-proof product design, testing, and certification services.
We have a dedicated team in the explosion-proof field.
Proficient in explosion-proof standards, we offer services including explosion-proof housing design, drafting, modification guidance, certification consultation, and more.
If you have a need for this as well, feel free to send us a private message anytime!

What are the standard requirements for explosion-proof certification? | Explosion-proof certification standards
What testing projects are required for explosion-proof certification of the product? What specific requirements are there for the product's explosion-proof design? How can the design pass the explosion-proof testing requirements smoothly? This is information many clients producing explosion-proof products are eager to know. Here, Zhongnuo Testing is here to address these doubts.

Is obtaining a防爆 certification and a防爆 compliance certificate the same thing?
Many customers ask during inquiries what the difference is between applying for a explosion-proof certification and an explosion-proof qualification certificate.
Explosion-proof certification and explosion-proof compliance certificate are two distinct concepts. Once a product undergoes explosion-proof certification, the resulting document is the explosion-proof compliance certificate.
Explosion-proof certification is a process, while the explosion-proof certificate is the result. So when the customer mentions doing an explosion-proof certification or an explosion-proof certificate,
The product must pass the explosion-proof standard tests and meet the standard requirements to obtain an explosion-proof certification.
Ex-proof certifications can be categorized into intrinsic safety types, flameproof types, pressurized types, and encapsulated types, among different explosion protection styles.
ZhongNuo Inspection has a team of explosion-proof engineers who can provide initial design services for explosion-proof circuits and structures.
Assist companies in preparing the necessary drawings, specifications, and manuals, including enterprise standards, for explosion-proof certifications, helping them obtain the explosion-proof qualification certificate.
If you require certification in this area, feel free to message us directly!

Specific meanings of explosion-proof grade letters
Explosion-proof protection type:
"ia," "ib," and similar notations denote the explosion-proof protection types of equipment. Equipment with the "ia" classification cannot ignite explosive gas mixtures under normal operation and both fault conditions, whereas "ib" classification equipment cannot ignite such mixtures under normal operation and one fault condition.
Gas Group Letters:
I: For coal mine gas environment.
IIA: Suitable for gases of lower hazard levels.
IIB: Suitable for ethylene and other medium-hazard gases.
IIC: Suitable for gases of equal or higher danger.
Hazard levels increase sequentially, with IIA < IIB < IIC.
Temperature group letters and numbers:
T1: The equipment's surface temperature does not exceed 450°C.
T2: The equipment's surface temperature does not exceed 300°C.
T3: Equipment surface temperature shall not exceed 200°C.
T4: The surface temperature of the equipment does not exceed 135°C.
T5: Equipment surface temperature does not exceed 100°C.
T6: The equipment's surface temperature does not exceed 85°C.
Equipment Protection Level Letter:
Explosive gas environment equipment with "" protection level, not a source of ignition during normal operation, expected failure, or rare failure.
Gb: Equipment for explosive gas atmospheres, with a "high" protection level, not a source of ignition under normal operation or anticipated fault conditions.
Gc: Equipment for explosive gas atmospheres with a "normal" protection level, not a source of ignition during normal operation.
Protection levels increase sequentially, i.e., Gc < Gb < Ga. Ga is applicable in Zones 0, 1, and 2; Gb is suitable for Zones 1 and 2; Gc is used for Zone 2 only.
Please translate the following foreign trade supply-related content into American English, leaving any content without Chinese unaltered: Example
For example, with the explosion-proof marking "Ex ia IIC T6 Ga":
"Ex": Indicates that the equipment is explosion-proof.
"ia": Denotes that the equipment has a high-level explosion-proof classification in intrinsic safety type.
"IIC": Indicates that the equipment is suitable for IIC explosive gas environments.
"T6": Indicates that the surface temperature of the equipment does not exceed 85°C.
"Ga": Represents the protection level of the equipment, applicable to Zones 0, 1, and 2.
In summary, understanding the meanings of explosion-proof ratings is crucial for selecting and using explosion-proof equipment correctly. Shenzhen ZhongNuo Testing Technology Co., Ltd., as a design and testing service provider for explosion-proof products, can offer you comprehensive testing and certification services for explosion-proof products to ensure your equipment meets relevant standards and requirements. For any inquiries or needs, please feel free to contact us at any time.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.